"Trying to decode the word "they" would sound silly to someone who already knows the word! Thats because "they" is a heart word, or one that readers need to know by heart. Sometimes heart words are high-frequency words or sight words. In this book, readers follow a decodable story that uses "they" frequently to allow readers many encounter with the word. Every time the word is used, it is called out to help readers notice and recognize "they." Full-color photographs complement the text"-- Provided by publisher.